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So if you need an engine dynamometer, why are you not using something that someone else has already built, tested, and debugged which is expressly for that very purpose? https://superflow.com/products/engine-dynamometers/

Also, for now, don't get too scientific about the engine-mount frequency. Grab the (not running) engine by hand and give it a good shove against its mounts, and watch what happens. If they're soft enough to matter, you can see the motion and get a visual estimate of the frequency. If you can...

Oooo-kay, that changes things a little. This sounds like a snowmobile or ATV application. I'm rather familiar with big-ish-twin motorcycle applications - but only in hire bikes. I don't own one. All of the ones that I have rented, mostly of the BMW F800 or F900 series, have been quite unhappy...

You haven't told us what engine it is, in case someone here knows something about it. Other drivetrain layouts can do something like this, too. We called it "snatching", and my carbureted gen 1 Honda Civic was terrible for doing that when puttering around in first gear (manual) at parking-lot...

The overall efficiency of green-energy to power-to-the-wheels is in the same vicinity as hydrogen (not great ...), but methanol is a whole lot easier to deal with than hydrogen is. Easier to store, easier to transport, easier to handle.

Not heard of it with VFDs. It's possible with certain types of AC inverters provided that they are interconnected as prescribed by the manufacturer so that their output phases are synchronised. Phase mismatch will cause something to go bang.

The less hazardous types either have other disadvantages (e.g. LFP a.k.a. LiFePo has lower energy density, and is unhappy at low temperatures) or haven't had all the issues worked out yet to the point of being commercialised (solid-state batteries, which eliminate the liquid electrolyte, which...

For a couple of years, no. Didn't need one for day-to-day living within Toronto. Only a third of Parisians own a car. https://reasonstobecheerful.world/cars-are-vanishing-from-paris/

Sure. Back when I lived and worked in Toronto, I used it all the time. Loads of people of all walks of life do. And Toronto's transit system is not great by international standards. Plenty of people in European cities don't own a car. Don't need one.

TugboatEng, clearly you haven't travelled much in cities that have good mass transit! Trains get huge numbers of people from one place to another at once. It's absurd to think of a train "making a left turn" because they don't do that (unless the rails guide them left). Trains don't have to...

I doubt if their "full self driving" is any further developed than what's currently seen on their production vehicles that are so equipped, and if that's the situation, they're orders of magnitude away from getting the number of "interventions" down to where it needs to be. This event happened...

Cities need mass transit that replaces individual cars, whether self-driving or not, not the other way 'round. Perhaps there's something to be said for small regional shuttle-buses with no fixed route to get people from outside the mass-transit coverage area to the nearest train or bus station...

If there are any safety consequences of the protection component failing to do its job, then a standard PLC is not a permissible component in the critical chain of events.

Bracing strut towers might make sense if the strut towers are considerably ahead of the firewall and not part of the firewall structure (see Mustang photo above), but in most typical vehicles that have MacPherson front suspension (includes mine), the strut towers form part of the firewall...

That's surely application specific. The ones I've seen use what look like die springs, and any deflection by hand is barely perceptible. I've never put a torque wrench to one to see what it took to bottom out the springs. There's no significant damping, though. Just springs, in those that I've...

Found this https://trade.mechanic.com.au/news/clutch-dampers-comfortable-driving-while-protecting-the-drivetrain-from-damage

Just to be clear - The mechanism inside the clutch is only going to be capable of evening out uneven rotation-speed of the crankshaft so that less of this is transmitted to the gearbox (whether the uneven rotation-speed is due to first-order or second-order inertial effects or due to compression...

You're talking about the mechanism inside the clutch disk in which the torque is transmitted through from the friction surface to the transmission input shaft via springs, right? I'm not aware of those being designed to do anything other than soak up the series of hammer-blows (power strokes)...

Found quickly by internet search https://megadynegroup.com/usa/products/timing-belts I will let you press the appropriate "contact us" or "request information" buttons or the links to more specific product ranges further down the page.

Why do you care? Properly designed gearboxes will have sufficient clearances between teeth, evident as backlash, for any such minor thermal or stress-related expansion to be accommodated without interference. If it ever gets to a binding condition with no backlash, you are going to have big...